Before I respond, I would like to congratulate you, because you are actually doing due diligence research before you make the jump. And it is faster (even though this is one long thread) to read through this thread, than learn from your own experience. So you are doing good.
On the other hand I keep repeating myself, so although asking for my personal advice is flattering, I am trying to get away from this thread and TST. Thus I will give my final word and the decision is yours...
So what is the risk to TST?
The only risk I calculate is, I am funded for the 30K plan and instantly lose $1.5K of their money and removed from the funded account. Am I correct?
Yes, but there are other things to consider. Most combiners don't get founded on the first try and time and money wasted on a dream is opportunity (to do something else) lost. So you can easily end up paying for 4-5 combines and spending 6 months on TST, when you could be earning a salary somewhere else. So although using TST might be cheaper for a newbie trying his hands at trading, we shouldn't forget the time factor. With your own money, you might lose it quickly in a month, then you decide trading is not for you, (or you don't have more money) and you start a new carrier. That could be a better outcome than getting stuck in TST's hamster wheel and keep dreaming of how great a trader you going to be.
So just sit down and do the math for 3 scenarios split in 2 ways, trading with TST and trading on your own: You lose money, you make a little and you make a lot.
--You lose 5-6 combine fees vs. you lose a small account of yours.
I used to joke that TST's slogen is:"Don't lose your money quickly to the market, when you can do it slowly to us." If you are paying for multiple combines, you might as well just lose that money in your real account and get over the dream quickly.
--You make a little money with TST vs. you do it on your own.
Here TST's 20% cut and their exchange fees (2 instruments for 12 months is 2040 extra bucks) will hurt a lot, so you are better on your own.
--You make it rain with TST or you do it own your own.
Here the tax advantage of being a trader will guide you to leave them after a year, not to mention that you don't want to pay them an extra 20% on big profits...
TL;DR: Unless you are an underage kid who can't open an account on his own or you live in a low cost of living country, TST is not a good deal...
Well, I think I am done with this thread....